Service manual

A-4
Network input
A
Technical specifications
Line code HDB 3 according to ITU-T Rec.
G.703.
Frame structure According to ITU-T Rec. G.832,
framing may be disabled.
Effective payload MPEG-2 specified transport
stream.
Error protection According to the DVB-C specifica-
tion for cable distribution, compris-
ing interleaving and (204,188)
Reed-Solomon forward error cor-
rection code.
Switching between error protection and no error protection is done automatically.
E3 input Number of inputs 2 high impedance inputs.
Maximum number of decoders in the same link 5 within stated specifications (a
maximum of 60 cm cable between
the units).
Connector type 75 Ω BNC female
Input impedance 75 Ω unbalanced using external
75 Ω termination.
Minimum input level According to ITU-T Rec. G.703.
-12dBat17.184MHz.
Return loss According to ITU-T Rec. G.703.
860 to 1720 kHz > 12 dB
1.720 to 34.368 MHz > 18 dB
34.368 to 51.550 MHz > 14 dB
Input jitter acceptance According to ITU-T Rec. G.823.
0.1 to 1.0 kHz. > 1.5 UI
pp
1.0 to 10kHz. > 20 dB/decade roll off
10 to 800 kHz > 0.15 UI
pp
Optional suppression of SDH/SONET pointer adjustments
AIS detection According to DVB TM1664.
DS3 system System specifications
Bit rate 44.736 Mbit/s ± 20 ppm according
ANSI. T1.102
Line code B3ZS according ANSI T1.102
Frame structure According to ITU-T Rec. G.804 or
G.752
Framing may be disabled.
Effective payload MPEG-2 specified transport
stream.
Error protection According to the DVB-C specifica-
tion for cable distribution, compris-
ing interleaving and (204,188)
Reed-Solomon forward error cor-
rection code.
Switching between error protection and no error protection is done automatically.